Scalable-Group Tag eXchange Protocol (SXP)
draft-smith-kandula-sxp-08

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Network Working Group                                           M. Smith
Internet-Draft                                                R. Kandula
Intended status: Informational                                 S. Appala
Expires: October 10, 2019                                  Cisco Systems
                                                           April 8, 2019

               Scalable-Group Tag eXchange Protocol (SXP)
                       draft-smith-kandula-sxp-08

Abstract

   This document discusses scalable-group tag exchange protocol (SXP), a
   control protocol to propagate IP address to Scalable Group Tag (SGT)
   binding information across network devices.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 10, 2019.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Smith, et al.           Expires October 10, 2019                [Page 1]
Internet-Draft Scalable-Group Tag eXchange Protocol (SXP)     April 2019

   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may not be modified, and derivative works of it may not
   be created, except to format it for publication as an RFC or to
   translate it into languages other than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  SXP Overview  . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  SXP Operation . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  SXP Connection Management . . . . . . . . . . . . . . . .   5
       3.1.1.  SXP Connection  . . . . . . . . . . . . . . . . . . .   5
       3.1.2.  SXP Message integrity/authenticity  . . . . . . . . .   6
       3.1.3.  SXP Connectivity Discovery and Connection Recovery  .   7
       3.1.4.  SXP Connection Setup Sequence . . . . . . . . . . . .   7
       3.1.5.  SXP Connection States . . . . . . . . . . . . . . . .   8
     3.2.  Binding Database  . . . . . . . . . . . . . . . . . . . .   9
       3.2.1.  SXP Learned IP-SGT Binding recovery . . . . . . . . .   9
   4.  Message Formats . . . . . . . . . . . . . . . . . . . . . . .   9
     4.1.  Bit and Octet Numbering Convention  . . . . . . . . . . .   9
     4.2.  SXP Message Header  . . . . . . . . . . . . . . . . . . .  10
     4.3.  Attribute Formats . . . . . . . . . . . . . . . . . . . .  10
     4.4.  SXP OPEN and OPEN_RESP Message  . . . . . . . . . . . . .  13
       4.4.1.  Node-ID . . . . . . . . . . . . . . . . . . . . . . .  14
       4.4.2.  Capabilities Advertisement  . . . . . . . . . . . . .  14
       4.4.3.  Keep-alive and Hold Time Negotiation  . . . . . . . .  17
     4.5.  SXP UPDATE Message  . . . . . . . . . . . . . . . . . . .  22
       4.5.1.  UPDATE Attributes . . . . . . . . . . . . . . . . . .  23
       4.5.2.  UPDATE Message Samples  . . . . . . . . . . . . . . .  32
     4.6.  SXP ERROR Message . . . . . . . . . . . . . . . . . . . .  35
       4.6.1.  Error Codes . . . . . . . . . . . . . . . . . . . . .  36
     4.7.  SXP PURGE-ALL Message . . . . . . . . . . . . . . . . . .  37
     4.8.  SXP KEEPALIVE Message . . . . . . . . . . . . . . . . . .  37
   5.  Update Message Handling . . . . . . . . . . . . . . . . . . .  37
     5.1.  UPDATE Message Validation . . . . . . . . . . . . . . . .  37
     5.2.  UPDATE Message processing . . . . . . . . . . . . . . . .  39
     5.3.  Generating UPDATE Message . . . . . . . . . . . . . . . .  43
   6.  SXP Failure Scenarios . . . . . . . . . . . . . . . . . . . .  44